Asperity Contact
Mostrando 1-3 de 3 artigos, teses e dissertações.
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1. Nanomechanical properties of rough surfaces
The nanoindentation technique allows the determination of mechanical properties at nanometric scale. Hardness (H) and elastic modulus (E) profiles are usually determined by using the Oliver-Pharr method from the load/unload curves. This approach is valid only for flat surfaces, or at least, when a very low degree of asperity is present (lower than 30 nm). Th
Materials Research. Publicado em: 2006-06
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2. INFLUÊNCIA DA CONDENSAÇÃO CAPILAR NA FRICÇÃO EM NANO ESCALA / INFLUENCE OF CAPILLARY CONDENSATION IN NANOSCALE FRICTION
In this work, the procedures developed to the calibration of the AFM photodetector and cantilevers for lateral force measurements in our AFM is presented. A Matlab code that controls the microscope allows the study of the influence of the normal force on the lateral one. A second Matlab code was developed in order to study the adhesion forces in an automated
Publicado em: 2005
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3. Modelamento do desgaste por deslizamento em anéis de pistão de motores de combustão interna. / Modelling of the sliding wear on piston rings of internal combustion engines.
The wear of piston rings and cylinder liner was modelled through a computer code that calculates the hydrodynamic and roughness contact pressures acting in the contact surfaces. The predicted wear is compared with a 750 hours dynamometer test of a medium duty diesel engine
Publicado em: 2000